Material And Geometric Nonlinear Analysis
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Finite element computational development for thermo-mechanical analysis of plane steel structures exposed to fire
Abstract This article presents a numerical formulation based on finite element procedures for application in nonlinear thermo-mechanical analyses of steel planar structures under fire condition. The mechanical properties of structural elements degrade when subjected to high temperatures, resulting in significant reductions in strength and stiffness. Under th
REM - International Engineering Journal. Publicado em: 2022
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2. Nonlinear numerical analysis of composite slabs with steel decking
Resumo O comportamento das lajes mistas é governado pelo cisalhamento longitudinal na interface entre o aço e o concreto, que é desenvolvido em lajes sob flexão simples. O método m-k e o método da interação parcial, utilizados no cálculo da resistência ao cisalhamento na interface aço-concreto de lajes mistas, são baseados em ensaios experimentai
Rev. IBRACON Estrut. Mater.. Publicado em: 11/11/2019
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3. Physical and geometric non-linear analysis using the finite difference method for one-dimensional consolidation problem
Abstract This article presents a numerical model based on the finite difference method for the physical and geometric non-linear analysis of a one-dimensional consolidation problem regarding a saturated, homogeneous and isotropic soil layer with low permeability and high compressibility. The problem is formulated by adopting the void ratio as the primary var
REM, Int. Eng. J.. Publicado em: 2019-06
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4. Nonlinear analysis of shape memory alloy beam under the thermal and the mechanical loads
ABSTRACT In this paper, the tension-compression asymmetry of shape memory alloys (SMA), subjected to the thermal and the mechanical loads, is sufficiently explored. Taking a basis of stress-strain relationship and a concern for critical phase transformation, a new simple model of mechanics is established. Through the deflection lines under different load con
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Nonlinear Forced Vibration Analysis of Dielectric-Elastomer Based Micro-Beam with Considering Yeoh Hyper-Elastic Model
Abstract The present study investigates nonlinear forced vibration of dielectric elastomer-based micro-beam. The nonlinear terms in beam equation are geometric and material one. Geometric nonlinearity is considered by von-Karman strain displacement relationship and the material nonlinearity is modeled with Yeoh hyper-elastic model. Galerkin and Multiple scal
Lat. Am. j. solids struct.. Publicado em: 2017-03
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6. Nonlinear Vibration and Mode Shapes of FG Cylindrical Shells
Abstract The nonlinear vibration and normal mode shapes of FG cylindrical shells are investigated using an efficient analytical method. The equations of motion of the shell are based on the Donnell’s non-linear shallow-shell, and the material is assumed to be gradually changed across the thickness according to the simple power law. The solution is provided
Lat. Am. j. solids struct.. Publicado em: 2017-03
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7. Geometrically nonlinear analysis of thin-walled laminated composite beams
Abstract The use of thin-walled composite beams in Engineering has attracted great interest in recent years. Composite beams and other structural elements tend to have thin walls due to the high strength of the material. Other important aspect is that, even without reaching large strains and without overcoming the elastic limit of the material, such as beams
Lat. Am. j. solids struct.. Publicado em: 2015-11
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8. Modified couple stress-based third-order theory for nonlinear analysis of functionally graded beams
A microstructure-dependent nonlinear third-order beam theory which accounts for through-thickness power-law variation of a two-constituent material is developed using Hamilton's principle. The formulation is based on a modified couple stress theory, power-law variation of the material, and the von Kármán nonlinear strains. The modified couple stress theory
Lat. Am. j. solids struct.. Publicado em: 2014-05
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9. Material and geometric nonlinear analysis of reinforced concrete frame structures considering the influence of shear strength complementary mechanisms
A mechanical model for the analysis of reinforced concrete frame structures based on the Finite Element Method (FEM) is proposed in this paper. The nonlinear behavior of the steel and concrete is modeled by plasticity and damage models, respectively. In addition, geometric nonlinearity is considered by an updated lagrangian description, which allows writing
Lat. Am. j. solids struct.. Publicado em: 2013-09
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10. Modelagem do comportamento dinâmico de edifícios mistos (aço-concreto) submetidos à ação do vento. / Modeling of the dynamic behaviour of steel-concrete composite buildings submited to wind actions.
Based on a favorable economic scenario and technological advances of material sciences and construction processes, in the last three decades, the Brazilian cities have presented a substantial growth, with respect to construction of residential and commercial multi-storey buildings. Nowadays, these buildings present greater slenderness and have been construct
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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11. Comparação de diferentes metodologias de cálculo para determinação de carga de colapso de estruturas metálicas formadas por perfis laminados e soldados / Comparison among different calculation methodologies for load collapse determination of metallic structures constituted by laminated and welded profiles
A grande importância que estruturas metálicas adquiriram atualmente impulsiona estudos e cálculos sobre as mesmas. O dimensionamento adequado desse tipo de estrutura é fundamental, gerando ampla variedade de programas computacionais para esse fim. Mas é imprescindível que se utilizem metodologias confiáveis. O complexo sistema de transportadores de co
Publicado em: 2011
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12. Sistema Computacional para Análise Avançada Estática e Dinâmica de Estruturas Metálicas
A new computational tool for the advanced static and dynamic analysis of steel framed structures based on the Finite Element Method has been developed and is presented herein. Understanding the static and dynamic behavior of a structure is essential for designing structures that are lighter and slenderer without affecting their safety and quality standards.
Publicado em: 2009